/* Image Tools Main Container */
.card {
    background-color: var(--card-bg, #fff);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin: 0 auto;
    max-width: 1200px;
    transition: all 0.3s ease;
}

/* Tabs */
.tabs-container {
    margin-bottom: 2rem;
}

.tabs {
    display: flex;
    justify-content: center;
    border-bottom: 1px solid var(--border-color, #eee);
    gap: 1rem;
}

.tab {
    padding: 1rem 1.5rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-muted, #666);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.tab:hover {
    color: var(--primary-color, #0056b3);
}

.tab.active {
    color: var(--primary-color, #0056b3);
    border-bottom-color: var(--primary-color, #0056b3);
}

/* Upload Area */
.file-upload-area {
    border: 2px dashed var(--primary-color, #0056b3);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    background-color: rgba(0, 86, 179, 0.02);
    transition: all 0.3s ease;
}

.file-upload-area:hover, .file-upload-area.drag-over {
    background-color: rgba(0, 86, 179, 0.05);
    border-color: #004494;
}

.file-upload-area i {
    font-size: 3.5rem;
    color: var(--primary-color, #0056b3);
    margin-bottom: 1.5rem;
}

/* Workspace Layout */
.workspace-main {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.canvas-wrapper {
    flex: 1;
    min-width: 300px;
    background-color: var(--surface-subtle); /* Slightly lighter, cleaner background */
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
    position: relative;
    overflow: hidden; /* Prevent overflow of large canvases */
}

/* Ensure canvas is responsive and fills the wrapper appropriately */
canvas {
    max-width: 100%;
    max-height: 80vh; /* Don't let it get taller than the viewport */
    height: auto;
    width: auto;
    display: block;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.sidebar-controls {
    width: 250px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background-color: var(--card-bg, #fff);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Override Cropper.js default checkerboard and modal background */
.cropper-container {
    background-color: transparent !important;
}
.cropper-bg {
    background-image: none !important;
    background-color: var(--surface-subtle) !important;
}
.cropper-modal {
    background-color: var(--surface-subtle) !important;
    opacity: 0.5 !important;
}
.cropper-view-box {
    outline-color: var(--primary-color, #0056b3) !important;
}
.cropper-line, .cropper-point {
    background-color: var(--primary-color, #0056b3) !important;
}


/* Tab-Specific Controls */
.tab-content {
    display: none;
    width: 100%;
    height: 100%;
}

.tab-content.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tab-specific-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.export-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}

/* Resize Inputs */
.resize-inputs {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
}

.resize-panel {
    padding: 1rem;
    background: var(--surface-subtle);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.resize-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.9rem;
}

.resize-panel-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-color);
}

.resize-panel-hint {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted-text);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.dimension-input {
    flex: 1;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
}

.input-group input {
    padding: 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
}

.dimension-input input {
    width: 100%;
    min-width: 0;
    padding: 0.8rem 0.9rem;
    font-size: 1rem;
    font-weight: 600;
    background: var(--surface-color, #fff);
}

.download-settings {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
}

.setting {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
}

.setting label {
    font-size: 0.9rem;
    font-weight: 600;
}

.setting-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.setting select {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--surface-color, #fff);
}

.quality-slider {
    width: 100%;
}

.download-action {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
}

.file-size-info {
    font-size: 0.85rem;
    color: var(--muted-text);
    font-weight: 500;
    line-height: 1.5;
}

/* Buttons */
.btn {
    padding: 0.7rem 1.2rem;
    border-radius: 6px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-success { background-color: #28a745; color: #fff; }
.btn-success:hover { background-color: #218838; }

.btn-secondary { background-color: #6c757d; color: #fff; }
.btn-secondary:hover { background-color: #334155; }

.btn i { font-size: 1rem; }

/* Color Picker UI */
.color-value-box {
    padding: 0.75rem 0.85rem;
    background: var(--surface-color, #fff);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text-color);
    text-align: center;
    line-height: 1.4;
}

.color-values-panel {
    display: grid;
    gap: 0.75rem;
}

.color-swatch-box {
    display: flex;
    justify-content: center;
    padding: 1rem;
    background: var(--surface-subtle);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

#colorDisplay {
    width: 100%;
    min-height: 72px;
    border-radius: 8px;
    border: 1px solid #ddd;
    box-shadow: inset 0 1px 1px rgba(255,255,255,0.35);
}

.hsl-box {
    background: var(--surface-subtle);
}

/* Loading & Error */
.loading {
    margin-top: 1rem;
    color: var(--muted-text);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--surface-strong);
    border-top: 2px solid var(--primary-color, #0056b3);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.error {
    margin-top: 1rem;
    color: #d9534f;
    background-color: #f2dede;
    padding: 0.8rem;
    border-radius: 6px;
    font-size: 0.9rem;
}

.hint {
    font-size: 0.85rem;
    color: var(--muted-text);
    font-style: italic;
    line-height: 1.4;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .workspace-main { flex-direction: column; }
    .sidebar-controls { width: 100%; order: -1; }
    .quality-slider { width: 100%; }
}